SDI OPEN WATER SCUBA DIVER EXAM + Q'S

SDI OPEN WATER SCUBA DIVER EXAM + Q'S 1. How big do Objects under water appear: Objects appear 33% larger underwa- ter. 2. How far away do objects appear underwater?: Objects appear 25% closer. 3. How much faster does sound travel in water, compared to air?: 4 times 4. How fast does Water conduct heat away from your body: 25 times faster than air does 5. As you descend what happens to colors and which colors?: colors fade, reds and oranges fade first, 30 meters seem blue and gray 6. At what water temp does your body need thermal protection: < 86 degrees 7. What does SCUBA mean: self-contained underwater breathing apparatus 8. When water stratifies itself into layers, according to temperature, the bound- ary between layers is known as a(n):